| Long: etag-save |
| Arg: <file> |
| Help: Parse ETag from a request and save it to a file |
| Protocols: HTTP |
| Added: 7.68.0 |
| --- |
| This option saves an HTTP ETag to the specified file. Etag is |
| usually part of headers returned by a request. When server sends an |
| ETag, it must be enveloped by a double quote. This option extracts the |
| ETag without the double quotes and saves it into the <file>. |
| |
| A server can send a week ETag which is prefixed by "W/". This identifier |
| is not considered, and only relevant ETag between quotation marks is parsed. |
| |
| It an ETag wasn't send by the server or it cannot be parsed, and empty |
| file is created. |
